To recover Google Chrome bookmarks, locate the User Data files titled Bookmarks and Bookmarks.bak, delete the Bookmarks file and rename the Bookmarks.bak file "Bookmarks." To recover Mozilla Firefox bookmarks, select Undo from the Bookmarks Library Organize menu or restore backed up bookmarks from a previous date.
To recover Google Chrome bookmarks on a Windows computer, do not close and reopen Chrome, as this deletes the bookmarks backup file. Launch Windows Explorer and plug the following location into the address bar: C:\Users\NAME\AppData\Local\Chrome\User Data\Default. Replace "NAME" with the name of your Windows user account.
Click the Organize menu and select Folder and Search Options. Uncheck the Hide Extensions for Known File Types option under the View tab in the Folder Options window. The file titled Bookmarks.bak is the most recent backup of your Google Chrome bookmarks. Close all open Chrome browser windows, delete the Bookmarks file and rename Bookmarks.bak as Bookmarks.
To recover recently deleted Mozilla Firefox bookmarks or bookmark folders, open the Bookmarks Library window and select undo from the Organize menu. If you are attempting to recover bookmarks deleted more than a day ago, go to the Import and Backup menu and hover your mouse over the Restore submenu. Select the date from which you wish to create the backup. This replaces your existing bookmarks with the bookmarks from the backup date, deleting any bookmarks you've created since then. To avoid losing new bookmarks, export existing bookmarks before restoring by using the Export to HTML function in the Import and Backup menu.